4.1 Identify the lathe component in FIGURE 4.1 below - NSC Mechanical Technology Fitting and Machining - Question 4 - 2022 - Paper 1
Question 4
4.1 Identify the lathe component in FIGURE 4.1 below.
A. Dead centre
B. Revolving centre
C. Centre drill
D. Taper drill bit
4.2 What is the purpose of the screw-cu... show full transcript
Worked Solution & Example Answer:4.1 Identify the lathe component in FIGURE 4.1 below - NSC Mechanical Technology Fitting and Machining - Question 4 - 2022 - Paper 1
Step 1
Identify the lathe component in FIGURE 4.1 below.
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Answer
The component shown in FIGURE 4.1 is known as a Dead centre, which is used to support the workpiece in a lathe machine.
Step 2
What is the purpose of the screw-cutting dial gauge found on a lathe machine?
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Answer
The screw-cutting dial gauge allows an operator to engage a lead screw half-not accurately, ensuring precise control of the machining process.
Step 3
How many axes are displayed on a digital read-out (DRO) system on a lathe machine?
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Typically, a digital read-out (DRO) system on a lathe machine shows 2 axes: the X-axis and the Z-axis.
Step 4
Which codes does a CNC (computer numerical control) milling machine use for machine tool moving?
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Answer
CNC milling machines primarily utilize G-codes, which are standardized codes to control the movements of the machine.
Step 5
What is the size of the carbide ball in a Brinell hardness tester when used for testing material?
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Answer
The size of the carbide ball used in a Brinell hardness tester is typically 10 mm.
Step 6
Identify the type of precision measuring tool in FIGURE 4.6 below.
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Answer
The tool depicted in FIGURE 4.6 is an Outside micrometer, used to measure external dimensions of an object.
Step 7
What type of stress is caused in a cable of a hoisting crane when lifting a load?
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Answer
The type of stress experienced in a cable when lifting a load is Tensile stress, as the cable is being pulled.
Step 8
Which ONE of the following factors determines the value of the safety factor?
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The value of the safety factor is determined by The consequences of failure, as this reflects the risk to safety and structural integrity.
Step 9
Which ONE of the following is an example of PVC?
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An example of PVC is Cling wrap, which is commonly made from polyvinyl chloride.
Step 10
Which ONE of the following is an advantage of nylon?
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One significant advantage of nylon is that it Can quickly turn to liquid when subjected to heat, making it useful in various applications.
Step 11
Identify A in FIGURE 4.11 below.
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Answer
In FIGURE 4.11, A refers to the Root of the screw thread.
Step 12
Which ONE of the following is an advantage of a multiple-start screw thread?
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An advantage of a multiple-start screw thread is that it Produces faster movement, allowing for quicker fastening.
Step 13
A block and tackle is also known as a ...
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Answer
A block and tackle system is also known as a pulley system, which is used to lift heavy loads.
Step 14
Identify the symbol of the hydraulic component in FIGURE 4.14 below.
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Answer
The symbol shown in FIGURE 4.14 refers to a Pump, commonly used in hydraulic systems.
